426816217 has 2 divisors, whose sum is σ = 426816218. Its totient is φ = 426816216.

The previous prime is 426816193. The next prime is 426816251. The reversal of 426816217 is 712618624.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 358572096 + 68244121 = 18936^2 + 8261^2 .

It is a cyclic number.

It is not a de Polignac number, because 426816217 - 2¹⁵ = 426783449 is a prime.

It is not a weakly prime, because it can be changed into another prime (426816317) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 213408108 + 213408109.

It is an arithmetic number, because the mean of its divisors is an integer number (213408109).

Almost surely, 2^426816217 is an apocalyptic number.

It is an amenable number.

426816217 is a deficient number, since it is larger than the sum of its proper divisors (1).

426816217 is an equidigital number, since it uses as much as digits as its factorization.

426816217 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 32256, while the sum is 37.

The square root of 426816217 is about 20659.5308998051. The cubic root of 426816217 is about 752.9167704876.

The spelling of 426816217 in words is "four hundred twenty-six million, eight hundred sixteen thousand, two hundred seventeen".